Halp to l



(Model.)

0. L. RIDGWAY.

HEATING STOVE.

Patented July 24, 18-83.

Fig 5- \A/IT M55555 "UNITED STATES PATENT- OFFICE.

CHARLES L. RIDGWAY, or nosrron, MASSACHUSETTS, ASSIGNOR or our- HALF TO L. L. rows, or SAME PLACE.

H EATING-STOVE.

SPECIFICATION forming part of Letters Patent No. 281,793, dated July 24, 1883.

Application filed February 13, 1883. (Modem Fig. 2 is a horizontal section upon the line 3/ g of Fig. 1. Fig. Sis ahorizontal section on.

the line 00 w of Fig. 1.

The object of the invention is to provide a heating stove or furnace with an extended heating or radiating surface without increasing the cost of construction.

Referring to the drawings, A (shown in Fig. 1 by dotted lines) is the outer casing of the furnace. to is the inner casing or shell. is the ash-pit; C, the fire-pot; D, the combustion-chamber; E, the heating chamber or drum.

One of the means by which I obtain the in creased radiating-surface is by utilizing the space or walls about the fire-pot. Heretofore this space or wall has not been used for the purpose of providing an increased radiatingsurface, because the fire-pot has either been of thick castiron or a cast-iron shell lined upon its interior walls with fire-brick, generally the latter; and the result of this construction is that the heat from the fire penetrates, if at all, to a very limited extent to the exterior wall of the fire-pot, and on account of the continuous surface of the cast-iron and fire brick, and also because of its being acompara- -tively 0001' surface, the fire in fire-pots of such construction is generally brighter at its center, and consequently does not throw out as much heat from its sides or exterior as though it burned as brightly upon the, exterior as atthe center.

By my invention I am enabled to obtain not only an increased radiating-surface, but I also obtain a more uniform combustion of fuel,.especially near the outer surface of the fire-pot. This result is brought about by extending the O of vertical or substantially vertical bars a,

separated by the spaces 0, as represented in Figs. 1 and 3 or I make it a shell having openings upon the side, if desired, to take the .place of the openings 0. This chamber opens into the combustion-chamber D, and air is supplied to it either through the opening b to the ash-pit or the opening cto the said chamber 0 as desired. I

I prefer the form of fire-pot shown in Figs. 1 and 3, and when such vertical bars 0 are used they may be cast separately and united at the top and bottom to a connecting-flange by means of bolts; or they may be cast in sections, and the sections bolted or otherwise secured together; or the entire pot may be in one casting. Whichever way is employed, I prefer to mount the fire-pot in such a way that it can be revolved, in order that all portions of the fire may be brought to a position from which it can be reached through the opening 0.

I have represented in Fig. 1 the fire-pot mounted upon the bed or annular plate 0*. This plate or bed is supported upon the antifriction rolls and has upon its under surface the gear c", (shown in Fig. 1,) by means of which and the pinion c and shaft 0 which may extend through the casing of the furnace, so that it may be turned from without the same, the fire-pot is revolved. I do not wish to be understood, however, as limiting myself to this especial means of supporting or revolving the fire-pot, as any other suitable means (of which there are many) may be employed for this purpose.

The grate F is pivoted at f, either by trun; nions cast therewith or a rod extending across the same, to the plate 0, and is adapted to be tipped to dump its contents into the ash-pit.

2 enres The ash-pit openings b and the openings are separated from each other by a casting or plate, Z), and there is an opening, b (see Fig. 1,) between the ash-pit and the chamber 0", through which ashes which may have fallen upon the upper surface of the fire-pot plate 0" may fall or be scraped into the ash-pit chamber. v

To prevent the ashes which fall from the side openings in the fire-pot from clogging the lower portion of the chamber a, I have arranged over the plate 0 a stationary scraper, c,which extends across the same, and as the plate is revolved removes the ashes upon the plate into the ash-pit. This opening If in the plate I) is closed by the slide 02, (shown in section in Fig. 1 and in plan in Fig. 3,) and as it is intended that there shall be no communication between the ash 1 pit chamber and the chamber 0 this slide is kept closed, except when it is necessary to open it for the purpose of removing ashes from the bed-plate 0 into the ash-pit. The bed-plate e" separates the chamber 0 from the ash-pit, and makes a fit with the frame-work or casing of the stove or furnace tight enough to prevent any appreci able amount of air passing about it into the chamber 0, as the chamber 0 is in substance a downward continuation of the combustionchamber about the fire-pot, and the products of combustion not only pass out from the firepot into the portion of the combustion-chamber above it, but also laterally into the chant ber 0*.

Between the inner casing, a, of the furnace and the outer casing, A,is the heating-chamber (2, into which cold air is taken through the openingse in the base-plate 0*, and as the chamber 0 about the fire-pot permits the heat from the fire to strike and heat the shell a, the cold air is immediately brought in contact with a heating-surface of large extent. This air-heating chamber and passage 0 is connected with the drum E by means of the passages c, and the cold air, passing upwardly through the passage 6, not only enters the drum, but passes about the outer shell, a, between it and the casing A, to the upper section or chamber, E, from which it escapes by suitable conducting pipes, in case of a furnace, to the various parts of the house, or, in case of a stove, by suitable openings into the room.

The heating chamber or drum E has the shell 6, which is surrounded by the upper portion of the casinga, and the space between the two provides the flue (Z, by which the products of combustion pass from the combustion-chamber about the drum to the escape-port d, which may be, as shown in Fig. 1, at the top of the furnace or at the side, as desired. The drum E is connected with the chamber E by means of passages 0", so that the air which passes through it and escapes therefrom into the chamber E, and the air which passes about the casing a in the passage 6 about the flue (I, also enters the chamber E. p

In order that any soot or ashes that may lodge in the flue (I may be easily removed, I have arrangedin the lower part thereof a plate, (1 having upwardly-projecting cross flanges or ribs (1 which divide the plate into pockets d, (see Fig. 2,) and by revolving this plate the ashes and soot are brought to any suitable position for removal therefrom. The plate (1 may have extending downwardly therefrom into the combustion-chamber the rod R, by which it may be reciproeated by hand, or by means of a poker introduced through the opening to the combustion-chamber.

It will be observed that the bottom m of the shell that forms the heating-drum E is made convexthat is, it projects at its center well into the combustionchamber Dso that its heating-surface is not only increased, but it is brought nearer the fire.

The perforated plate or coal-guard (2 may project from the casing a over the upper portion of the chamber c on the upper edge of the fire-pot to prevent coal from falling into it, if desired.

In case the invention is employed in aheating-stove I may or may not use the outer casing, A. If the outer casing is not used, there will be a lower heating-section, which comprises the portion of the inner casing, a, which surrounds the fire-p ot chamber c and the combustion-chamber D, and the upper heatingsection, which comprises the portion of the casing a about the flue d and the heatingdrum E, into which the cool air fromthe room enters through passages c, and from which it escapes into the room through the passages 0". WVhen it is used with the shell A, it will be observed that the heating area of the stove or furnace is very great, in that it comprises the entire inner shell, a, from the ash-pit chamber upwardly, and the area of the wall or shell. 0* of the drum E, so that the air entering through the opening 0 is first brought in contact with the heated shell a, and, passing upward, either enters the drum E, by which it is more heated, or passes through the narrow passage upon the outside of that portion of the shell a which surrounds the flue (Z.

01" course the shell to may be corrugated, if desired, to increase its radiatingsurfaee, and also the shell 0'' of the heating chamber or drum E.

Of course the openings 0, b, and the opening (1 to the combustion-chamber are adapted to be closed by suitable doors.

I am aware that revolving grates are not new, and that fire-pots having side openings have been arranged to be revolved, as shown and described in Patents No. 151,212, No. 204,911, and No. 105,384; but I consider that these elements do not constitute the spirit of my invention.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States 1. The combination of the casing A of a furnaee or stove, the fire-pot 0, adapted to be revolved, and having the vertical opening 0,

the chamber 0, separated from the ash-pit by the plate 0', and opening into the combustionchamber D, and the side opening, 0, thereto, all substantially as and for the purposes described. 1

2. The combination, in a heating stove or furnace, ofthe' casing A, the fire-pot G, the grate F, the chamber 0 about the fire-pot, opening into the combustion chamber,. and the plate a, for separating the ash-pit chamber from the chamber 0 and preventing air from passing upwardly except through the grate F, all substantially as and for the purposes described.

3. The combination, in a heating stove or.

passing upwardly except through the grate F, and the air-heating chamber 6, extending from the base of the stove or furnace upwardly about the chamber a and combustion-chamber, all substantially as and for the purposes described.

4. The combination, in a stove or furnace, of the chamber 0*, entirely surrounding the fire-pot, and the air-heating chamber 6, eX- tending from the base of the furnace upwardly, the drum E, and passages connecting the said chamber 6 with the drum, all substantially as and for the purposes described.

5. The arrangement, in the base or lower portion of the flue d, of the plate d, having scrapers (Z and adapted to be revolved therein, all substantially as and for the purposes described.

6. The combination of the stationary scrap or c with the revolving bed-plate c, all substan "tially as and for the purposes described,

Executed at Boston, Massachusetts, the 8th day of February, 1883.

CHARLES L. RIDGWAY. lVitnesses:

F. F. RAYMOND, 2d, Bownorn S. PARKER. 

